Where would environmental economics be without first principles? OK, so we're not off topic. Check out this video from YouTube from Yoram Bauman, Ph.D., The world's first and only stand-up economist who explains Mankiw's "ten principles of economics." The clip is a presentation at the American Association for the Advancement of Science's annual meeting.
Hat tip: Gernot Wagner.
Update: Actually, we're ON topic. Bauman was the economist on this study that made it into the news and on this blog on January 11.